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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 331 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.16 × 8 =
  2. 2.59 × 4 =
  3. 3.31 × 8 =
  4. 4.36 × 8 =
  5. 5.34 × 4 =
  6. 6.74 × 4 =
  7. 7.27 × 8 =
  8. 8.13 × 4 =
  9. 9.28 × 8 =
  10. 10.69 × 4 =
  11. 11.58 × 4 =
  12. 12.20 × 8 =
  13. 13.32 × 8 =
  14. 14.22 × 8 =
  15. 15.56 × 4 =
  16. 16.29 × 8 =
  17. 17.38 × 8 =
  18. 18.35 × 4 =
  19. 19.16 × 4 =
  20. 20.57 × 4 =
  21. 21.29 × 4 =
  22. 22.62 × 4 =
  23. 23.39 × 8 =
  24. 24.17 × 4 =
  25. 25.26 × 4 =
  26. 26.47 × 4 =
  27. 27.34 × 8 =
  28. 28.18 × 8 =
  29. 29.17 × 8 =
  30. 30.45 × 4 =
  31. 31.40 × 8 =
  32. 32.73 × 4 =
  33. 33.35 × 8 =
  34. 34.23 × 8 =
  35. 35.15 × 4 =
  36. 36.12 × 8 =
  37. 37.24 × 8 =
  38. 38.32 × 4 =
  39. 39.18 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 128
  2. 236
  3. 248
  4. 288
  5. 136
  6. 296
  7. 216
  8. 52
  9. 224
  10. 276
  11. 232
  12. 160
  13. 256
  14. 176
  15. 224
  16. 232
  17. 304
  18. 140
  19. 64
  20. 228
  21. 116
  22. 248
  23. 312
  24. 68
  25. 104
  26. 188
  27. 272
  28. 144
  29. 136
  30. 180
  31. 320
  32. 292
  33. 280
  34. 184
  35. 60
  36. 96
  37. 192
  38. 128
  39. 72
  40. 264

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